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CVE-2017-18371
The ZyXEL P660HN-T1A v2 TCLinux Fw #7.3.37.6 router distributed by TrueOnline has three user accounts with default passwords, including…
Critical9.8EPSS 22.5%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
The ZyXEL P660HN-T1A v2 TCLinux Fw #7.3.37.6 router distributed by TrueOnline has three user accounts with default passwords, including two hardcoded service accounts: one with the username true and password true, and another with the username supervisor and password zyad1234. These accounts can be used to login to the web interface, exploit authenticated command injections, and change router settings for malicious purposes.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Critical9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 22.5% · top 2.3% of all CVEs (4 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
n/a
- affected n/a
References (5)
- https://seclists.org/fulldisclosure/2017/Jan/40 (opens in a new tab)x_refsource_MISCx_transferred
- https://ssd-disclosure.com/index.php/archives/2910 (opens in a new tab)x_refsource_MISCx_transferred
- https://unit42.paloaltonetworks.com/new-mirai-variant-targets-enterprise-wireless-presentation-display-systems/ (opens in a new tab)x_refsource_MISCx_transferred
- https://raw.githubusercontent.com/pedrib/PoC/master/advisories/zyxel_trueonline.txt (opens in a new tab)x_refsource_MISCx_transferred
- http://www.zyxel.com/support/announcement_unauthenticated.shtml (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2017-18371)Record last updated .